EPD

Porting of Waveshare official 2in9 lib for esp32 idf.

Getting Started

This library works with idf version 3.3 and 4.0 (stable version at writing time)

To get started see Espressif offical doc

How connect eink display

Signal	GPIO
DIN / MOSI	GPIO_NUM_23
CLK	GPIO_NUM_18
CS	GPIO_NUM_5
DC	GPIO_NUM_26
RST	GPIO_NUM_27
BUSY	GPIO_NUM_32

Usage

unsigned char image[EPD_WIDTH*EPD_HEIGHT/8];
Paint paint(image, 0, 0);
Epd epd;
	
if (epd.Init(lut_partial_update) != 0) {
    ESP_LOGE(kEPDTAG, "e-Paper init failed");
    vTaskDelay(2000 / portTICK_RATE_MS);
    return;
}

epd.ClearFrameMemory(0xFF); 
epd.DisplayFrame();
epd.ClearFrameMemory(0xFF); 
epd.DisplayFrame();

paint.SetRotate(ROTATE_90);
paint.SetWidth(EPD_WIDTH);
paint.SetHeight(EPD_HEIGHT);

paint.Clear(UNCOLORED);

paint.DrawStringAt(0, 0, "e-Paper Demo F24", &Font24, COLORED);

paint.DrawStringAt(0, 28, "e-Paper Demo F20", &Font20, COLORED);

paint.DrawStringAt(0, 50, "e-Paper Demo F16", &Font16, COLORED);

paint.DrawStringAt(0, 70, "e-Paper Demo F12", &Font12, COLORED);

paint.DrawStringAt(0, 90, "e-Paper Demo F8", &Font8, COLORED);

epd.SetFrameMemory(paint.GetImage(), 0, 0, paint.GetWidth(), paint.GetHeight());

epd.DisplayFrame();